Example Case: A Curry Shop in a Din Daeng Soi, 2026 (B.E. 2569), and the Pot Left Overnight

Note: this is a typical scenario built from situations commonly seen after urban floods. It is not the account of any specific real person.

Auntie Noi has sold rice and curry from the front of a shophouse in a Din Daeng soi for years. In the last week of September 2026, rain fell hard for days. Water spread from the main road into the soi, and the floor in front of her stall never dried. Half of her regulars, office workers from the Ratchadaphisek area, stopped coming because getting around was so difficult. To avoid going to the market every morning, Auntie Noi cooked big pots of green curry with chicken, pork panang and five-spice stewed pork, planning to sell from them for two days.

That night the power in the soi went out for several hours. The still-warm pots sat on a table in the shop with their lids on until morning, and the refrigerator holding minced pork and chicken stayed warm all night. The next day she reheated the curries until they were hot on top and sold them as usual. By late morning, two or three customers complained of cramping stomach pain and repeated loose stools, without fever and without vomiting. Her eight-year-old grandson, who ate the stewed pork at lunch, developed similar symptoms that evening.

Fortunately, everyone improved within about a day with oral rehydration salts and rest. But Auntie Noi was worried. When the water in the soi receded, she found a thin film of mud in the corners, around table legs, under the food cabinet and beneath the sink. The drain in front of the shop smelled foul, and the wet waste bin had spilled across the floor. She wanted to understand what had happened and how to make the shop safer before reopening fully.

The Din Daeng Flood of 2026 (B.E. 2569): Facts from News Reports

The following timeline is compiled from reports by Thai PBS, Naewna and Siam Rath. No figures have been added beyond what those reports state.

• 25 September 2026, 18:30: a flooding point was reported on Ratchadaphisek Road in front of the Chinese Embassy (Naewna).
• 26 September 2026: water on Din Daeng Road measured 11.4 cm and on Ratchadaphisek Road 10.3 cm (Thai PBS).
• 4 October 2026: heavy rain fell in 22 Bangkok districts, and Pracha Suk Road at Soi Inthamara 34 had 15 cm of water (news reports).
• 6 October 2026: Pracha Suk Road still had minor standing water (Siam Rath).

More broadly, Bangkok saw intense rain from 24 to 27 September 2026, and on 26 September 2026 the Bangkok Metropolitan Administration declared all 50 districts a disaster area. National figures from the Department of Disaster Prevention and Mitigation as of 06:00 on 7 October 2026 listed 27 provinces plus Bangkok affected, covering 123 districts, 984 subdistricts, 1,154,875 households and more than 3.1 million people.

What Is Clostridium perfringens, and Is It Dangerous?

Clostridium perfringens is a bacterium that thrives where oxygen is scarce. It is found widely in soil, mud, dust, sewage and the intestines of people and animals. Its key survival trick is the spore, a dormant, highly resistant form that can survive ordinary cooking temperatures, drying and long periods in the environment. When conditions become favorable, the spores germinate into active bacteria that multiply very quickly.

The US Centers for Disease Control and Prevention (CDC) describes it as one of the most common causes of foodborne illness. Outbreaks are usually linked to food prepared in large quantities, such as meat, poultry, curries, gravies and stews, that is kept at unsafe temperatures for too long. The bacteria multiply in the food, and once swallowed they produce a toxin in the gut that causes diarrhea and cramps.

For most healthy people the illness is short and not severe, usually settling within about a day. Young children, older adults and people with chronic illness can become dehydrated faster, however, so it should not be brushed aside. The same organism is also associated with rare but serious infections of deep wounds contaminated with soil or mud, a condition that needs urgent medical care. That makes wound care after wading through floodwater just as important as food safety.

How Does Clostridium perfringens Spread, and Why Did the Din Daeng Flood Raise the Risk?

People often search "how does food poisoning spread". For Clostridium perfringens, the main route is eating food in which the bacteria have multiplied to high numbers. It does not spread from person to person by coughing or sneezing. The core problem is how food is stored and reheated, but a dirty post-flood environment increases the chance of spores reaching kitchens and ingredients.

1. Big pots that cool slowly

When rain is heavy and travel is hard, restaurants, community kitchens and households cook in bulk. Large volumes of food cool slowly, and the long stretch between hot and warm is exactly when the bacteria multiply fastest. A pot left overnight on a switched-off stove, or in a stuffy room, carries a much higher risk.

2. Power cuts and warm refrigerators

Urban flooding often leads buildings to shut off ground-floor power for safety, or causes intermittent outages. Meat, leftover curry and cooked food in the fridge then sit at unsafe temperatures for too long. Many people are unsure whether the food is still safe. The general rule: when in doubt, throw it out.

3. Mud and sewage entering kitchens

Spores live in soil, mud and sewage. When water backs up from street drains into a shop or ground-floor kitchen, sediment settles on floors, table legs, under sinks, on shelves and cutting boards. If cleaning is incomplete, spores and dirt can reach food on hands or utensils.

4. Wounds from wading

Walking through water on Din Daeng, Ratchadaphisek or Pracha Suk roads can expose feet to broken glass, metal and other hidden sharp objects. Mud-contaminated wounds let many types of bacteria in, including the Clostridium group. Wash wounds promptly with clean water and soap, and see a doctor for deep or dirty wounds.

Symptoms: Diarrhea After a Flood, Stomach Cramps After Leftover Food

If you are searching "diarrhea after flood" or "stomach cramps after overnight curry", your symptoms may fit Clostridium perfringens food poisoning. According to the CDC, the typical pattern is:

• Symptoms start about 6 to 24 hours after eating contaminated food.
• Watery diarrhea and cramping abdominal pain.
• Usually no fever, and vomiting is uncommon.
• Illness usually lasts less than about 24 hours.
• It is not passed from person to person through contact or breathing.

These symptoms resemble food poisoning from many other germs, so do not self-diagnose, especially after a flood, when several sewage-borne germs may be involved. Seek medical care right away for bloody stools, high fever, vomiting so frequent you cannot keep fluids down, very little or very dark urine, dry mouth, dizziness, drowsiness, or illness that does not improve within one to two days. Young children, older adults, pregnant women and people with chronic illness should see a doctor sooner than others.

Who Is Most at Risk After the Din Daeng Flood of 2026 (B.E. 2569)?

• Young children dehydrate quickly and often eat food that adults reheat for them without knowing how long it was stored.
• Older adults, especially those in apartments and shophouses who cannot easily buy fresh food during floods and end up eating leftovers for several meals.
• People with chronic conditions such as kidney disease, heart disease, diabetes or weakened immunity, for whom dehydration hits harder.
• Restaurant owners and community kitchens preparing large quantities in kitchens that took in water or mud.

Where Germs Hide in Din Daeng Shops, Shophouses and Condominiums After the Water Recedes

After floodwater drains away, Clostridium perfringens and other sewage-borne germs tend to linger where moisture, sediment and food scraps meet. These are the places to inspect and clean thoroughly:

• Kitchen floors and tile joints, where mud packs into grout lines and wall corners.
• Under the sink and around waste pipes, where sewage backs up easily when street drains are full.
• Table legs, food cabinets and ingredient shelves that stood in water or were splashed.
• Wooden cutting boards, ladles and scratched plastic containers that absorb moisture and dirt.
• Refrigerators and freezers, both inside, where food spoiled during the outage, and outside, around door seals and the base of the unit.
• Basement car parks, storerooms and ground-floor corridors in Din Daeng condominiums where street water flowed in.
• Ground-floor and shop bathrooms where water backed up through toilets or floor drains.

Why Cleaning by Yourself Is Often Not Enough After a Flood

Many homes and shops in Din Daeng started cleaning as soon as the water dropped, which is exactly right. But a few common mistakes let germs survive:

• Cleaning only what is visible, without moving cabinets, shelves or appliances, so sediment under heavy items stays put.
• Using one mop for the whole house, from bathroom to kitchen, which spreads dirt instead of removing it.
• Applying disinfectant before removing mud, although the CDC and WHO advise cleaning first, because mud and organic residue stop disinfectants working properly.
• Mixing chemicals, such as bleach with ammonia or certain toilet cleaners, which can release dangerous gases.
• Skipping high-touch points such as door handles, fridge handles, stair rails, light switches and lift buttons in condominiums.

It is also important to understand that Clostridium perfringens spores are tougher than ordinary bacteria. The most effective defenses are physical removal, scrubbing away mud and food residue completely, and food safety, keeping food properly hot or cold and reheating it thoroughly. Disinfection spraying after cleaning is a supporting step that improves the overall hygiene of surfaces; it does not replace either of those defenses.

WHO and CDC Guidance: Clean First, Then Disinfect

The World Health Organization and the CDC agree on the principle: surfaces touched by floodwater should first be cleaned with water and soap or detergent to remove dirt, then disinfected with a suitable product, and the area should be dried as quickly as possible to limit mold and musty smells. Thailand's Department of Disease Control also reminds people after floods to watch for diarrheal disease and food poisoning, eat freshly cooked food, drink safe water, and wash hands with soap before eating and after using the toilet.

CDC food safety guidance to reduce Clostridium perfringens risk includes keeping hot food at about 60°C (140°F) or above, keeping cold food at about 4°C (40°F) or below, dividing large batches into shallow containers so they cool quickly, refrigerating within two hours of cooking, and reheating leftovers thoroughly to at least about 74°C (165°F) before eating.

WHD Disinfection Spraying After the Din Daeng Flood 2026 (B.E. 2569) with CHEMGENE HLD4H

World Health Disinfection (WHD) provides a disinfection spraying service carried out by trained technicians. According to the service page, they use spraying and Ultra Low Volume (ULV) fine-mist fogging with CHEMGENE HLD4H, a medical-grade disinfectant from the United Kingdom containing Benzalkonium Chloride and Didecyldimethylammonium Chloride.

According to WHD's service and product information, the disinfectant is described as broad-spectrum against viruses, bacteria and fungi, naming COVID-19, RSV, influenza H1N1, H5N1, hand-foot-and-mouth virus, Salmonella and common fungi, with a stated efficacy of 99.99% on the service page. The site refers to approvals or testing involving Thailand's Department of Medical Sciences, Mahidol University, NHS England and the EN 14476:2013+A2:2019 standard.

To be clear: Clostridium perfringens is not on the list of organisms named on WHD's pages. It is a bacterium, in the group the product says it covers in general, but its spores are resistant to many disinfectants. This article therefore makes no claim that spraying eliminates its spores. If you need test data for this specific organism, ask WHD directly. What the service genuinely delivers is surface hygiene across the whole space after the mud is removed, reducing many groups of sewage-borne germs and helping a shop, home or building return to use with more confidence.

The WHD post-flood spraying process

1. Survey and assessment. Send photos or video via LINE @whd268 or call 065-556-6294 so the team can assess the size of the area, where water entered, and how the space is used: restaurant, shophouse, condominium or office.
2. Mud removal and washing first. Mud, garbage and contaminated food must go, and floors and walls must be washed with water and detergent. The team will advise what to finish before spraying day.
3. Zoning and preparation. Put away or cover food, food containers and personal items, switch off necessary electrical equipment, and make sure people and pets leave the zone being sprayed.
4. Spraying. Technicians spray or ULV-fog floors, lower walls, bathrooms, corridors and high-touch points.
5. Waiting and re-entry. According to the service information, wait about 30 minutes, then re-enter when the technicians say it is ready. For surfaces that touch food directly, follow the technicians' advice before using them again.

WHD is based in Bang Khae district, Bangkok 10160, and serves Bangkok including Din Daeng. Customers outside Bangkok can enquire by phone or LINE. Scheduling depends on the job queue and the size of the area, so contact the team in advance. Tax invoices are available, and according to the service page the current promotion includes a free CHEMGENE spray bottle and WELLGIENIC wet wipes.

10 Reasons to Book Disinfection Spraying After the Din Daeng Flood of 2026 (B.E. 2569)

1. It finishes the job after mud removal, treating surfaces across the whole shop or home, not just the visible stains.
2. It addresses many germ groups from sewage. Urban floodwater carries bacteria, viruses and fungi, and a professional spraying service lowers the overall risk.
3. ULV mist reaches awkward corners under shelves, behind cabinets and along wall joints that cloths miss.
4. It uses a medical-grade disinfectant, CHEMGENE HLD4H from the UK, which the site links to several approvals.
5. It suits restaurants and community kitchens that must keep serving and want to reassure customers around Din Daeng and Ratchadaphisek.
6. It helps condominium common areas: car parks, corridors, garbage rooms and lifts shared by many residents.
7. It does not take long. According to the service information, wait about 30 minutes before re-entering as the technicians advise.
8. Trained technicians know how to prepare a space, what to put away and how to keep occupants safe.
9. It avoids risky home chemical mixing that can release harmful gases or damage surfaces.
10. Tax invoices are available for shops, companies and juristic persons. See service details.

Before and After Spraying: How a Din Daeng Curry Shop Changes

Food Poisoning Prevention Checklist After the Din Daeng Flood 2026 (B.E. 2569)

Food

• Discard food that touched floodwater and refrigerated food you are unsure about after a long outage.
• Cook just enough. If you cook in bulk, divide into shallow containers and refrigerate within two hours.
• Food served hot should stay hot, not lukewarm all day.
• Reheat leftovers until steaming hot throughout the pot, not just the surface.
• Eat donated boxed meals promptly; do not leave them in the heat.
• Drink bottled or boiled water.

Home and shop

• Wear rubber gloves, boots and a mask while removing mud.
• Clean from high to low, and keep separate mops for bathroom and kitchen.
• Wash dishes and utensils with detergent, then scald with hot water or air-dry.
• Open doors and windows and use fans to speed drying.
• Book a disinfection spraying service after mud removal, and stay out of the zone during spraying.

Frequently Asked Questions: Clostridium perfringens After a Flood, and Disinfection

What is Clostridium perfringens?

A bacterium found in soil, mud, sewage and the gut. It forms heat-resistant spores and commonly causes food poisoning from large batches of food stored incorrectly.

What causes diarrhea after a flood?

Many germs, including bacteria, viruses and parasites in contaminated water and food. Clostridium perfringens from leftover food is one of them. See a doctor if symptoms are severe or do not improve.

I ate overnight curry and now have cramps and diarrhea. Is it food poisoning?

Possibly. Cramps and watery diarrhea starting 6 to 24 hours after eating leftovers, without fever, fit this type of food poisoning, but only a doctor can diagnose it.

How does Clostridium perfringens spread?

By eating food in which the bacteria have multiplied. It does not spread through coughing or sneezing, though a dirty post-flood environment increases kitchen contamination.

Is it dangerous? Does it go away on its own?

Most cases are mild and improve within about a day. Children, older adults and people with chronic illness risk dehydration and should see a doctor if symptoms are severe.

Can disinfection spraying eliminate Clostridium perfringens?

No organism-specific test result is claimed. It is a bacterium, in the group the product says it covers, but its spores are tougher than most germs. Mud removal and safe food handling matter most. Ask WHD for test data.

Do I need to clean before disinfection spraying?

Yes. Remove mud and dirt completely first, then disinfect, as WHO and CDC advise.

When can I go back in or reopen my shop after spraying?

According to the service information, wait about 30 minutes and re-enter when the technicians say so. Follow their advice for food-contact surfaces.

Is there a disinfection service near me in Din Daeng?

WHD is in Bang Khae, Bangkok, and serves Bangkok including Din Daeng. Call 065-556-6294 or LINE @whd268 to arrange a survey.

The Water Has Gone Down in Din Daeng in 2026 (B.E. 2569). Let WHD Finish the Job

If your restaurant, home, shophouse or condominium in Din Daeng, whether on Din Daeng Road, Ratchadaphisek Road or Pracha Suk Road at Soi Inthamara 34, went through flooding in 2026 (B.E. 2569), start by removing mud and making your food safe, then let the WHD team handle the final step with whole-area disinfection spraying. Send photos of the space and the team can assess it right away.

Book Post-Flood Disinfection Spraying

Call 065-556-6294 | LINE @whd268

Related Services

• World Health Disinfection spraying service
• CHEMGENE HLD4H disinfectant
• Residential and building ozone disinfection for musty odors after floods

References

• Thai PBS (26 September 2026), water levels on Din Daeng and Ratchadaphisek roads: https://www.thaipbs.or.th/news/content/558585
• Naewna (25 September 2026), flooding point on Ratchadaphisek Road at the Chinese Embassy: https://www.naewna.com/n/bkk/81721/
• Siam Rath (October 2026), rain and standing water on Pracha Suk Road: https://siamrath.co.th/quality-of-life/326332
• Government Public Relations Department, DDPM data as of 7 October 2026: https://www.prd.go.th/th/content/category/detail/id/33/iid/548715
• CDC, Clostridium perfringens: https://www.cdc.gov/food-safety/foodborne-germs/clostridium-perfringens.html
• CDC, Floods: https://www.cdc.gov/floods/
• World Health Organization, Food safety: https://www.who.int/news-room/fact-sheets/detail/food-safety
• Department of Disease Control, Thailand: https://ddc.moph.go.th/